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The Magnetic Reed Switch RC-33 NC is a high-performance recessed wired contact sensor designed for home security and burglar alarm systems. Made from durable flame-retardant ABS material, it features a normally closed (NC) operation with a 10mm actuation distance, ensuring quick and accurate detection. This sensor operates within a voltage range of DC 0V-24V and is compatible with various access control systems, making it an ideal choice for securing doors and windows.
R**3
Very Small and Hidden Door Sensor
I was looking for a basic wired door sensor to install in my doors for Home Assistant and these were perfect, the sensor is so small it is hard to see it once installed, exactly the look I was going for.
W**
Not normally open.
Simply needed normally open switches. These are nor. Beware.
K**H
Had new windows out in and didn’t think to pull magnets so this worked well
Exactly what I wanted
D**1
Order extra
It's a good thing there were 5 units in the package and my immediate need was for two. I found that only two of the supplied switches actually worked. One was shorted closed and two others were stuck open no matter how strong the magnet was.If you purchase, test each unit before installing to avoid re-do's later.
C**.
Good quality
Easy to install, plenty of wire leads
L**Z
Bad
I should have read the reviews like I normally do. Its a switch what could go wrong.First off they are labeled wrong. NC was NO. Second many did not even work out of the bag.Junk.
H**P
Good product
Was exactly as described and worked perfectly!
R**T
These are NOT Normally Open switches. They are Normally Closed
Several other purchasers have noted this too. When you have these near its magnet partner, they close (there is no 'normally' in having the magnet nearby. When the magnet is away (which, in physics and real life) it is open.I knew these were mislabel, that is, I needed a normally closed switch, so I bought these as they did what I needed.I, and other purchasers, all wish these vendors, maybe outside the U.S., would spend a minute reading any number of sources available to get their naming right.Also, if I am wrong and I have been known to be in the past, someone please reply and let me know (and please reference your source). Thanks
Trustpilot
3 weeks ago
2 weeks ago